Lady Gaga on festival tour

Last week eccentric American pop star Lady Gaga was confirmed as the headline act on the main stage at Radio 1’s Big Weekend event on May 14-15.

But it's a tough call as to whether that will be the highlight of her festival season. Just days earlier, the Grammy award-winning singer will be performing at the annual gala event of the Robin Hood Foundation, the traditional Wall Street fundraiser supporting charities that combat poverty in New York. The event will this year be co-chaired by BlackRock co-founder Laurence Fink, Goldman...